Annotation of html5/spec-author-view/the-button-element.html, revision 1.276
1.187 mike 1: <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"><!-- when publishing, change bits marked ZZZ --><html class="split chapter" lang="en-US-x-Hixie"><meta content="text/html; charset=ascii" http-equiv="Content-Type"><title>4.10.8 The button element — HTML5 (Edition for Web Authors)</title><link href="whatwg.css" rel="stylesheet"><style type="text/css">
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1.121 mike 184:
1.1 mike 185: </style><style type="text/css">
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1.26 mike 248:
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1.25 mike 272: </style><link href="data:text/css," id="complete" rel="stylesheet" title="Complete specification"><link href="data:text/css,.impl%20%7B%20display:%20none;%20%7D%0Ahtml%20%7B%20border:%20solid%20yellow;%20%7D%20.domintro:before%20%7B%20display:%20none;%20%7D" id="author" rel="alternate stylesheet" title="Author documentation only"><link href="data:text/css,.impl%20%7B%20background:%20%23FFEEEE;%20%7D%20.domintro:before%20%7B%20background:%20%23FFEEEE;%20%7D" id="highlight" rel="alternate stylesheet" title="Highlight implementation requirements"><script type="text/javascript">
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1.9 mike 287: }
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1.160 mike 308: </script><link href="http://www.w3.org/StyleSheets/TR/W3C-ED" rel="stylesheet" type="text/css"><link href="style.css" rel="stylesheet"><script src="link-fixup.js"></script><link href="common-input-element-attributes.html" rel="prev" title="4.10.7.2 Common input element attributes">
309: <link href="Overview.html#contents" rel="index" title="Table of contents">
310: <link href="association-of-controls-and-forms.html" rel="next" title="4.10.18 Association of controls and forms">
311: <body onload="fixBrokenLink(); init()"><div class="head" id="head">
1.9 mike 312: <p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
1.36 mike 313:
1.276 ! mike 314: <h1>HTML5 (Edition for Web Authors)<span class="rcsrevision"> revision 1.4467</span></h1>
1.9 mike 315: </div><div>
1.160 mike 316: <a href="common-input-element-attributes.html">← 4.10.7.2 Common input element attributes</a> –
317: <a href="Overview.html#contents">Table of contents</a> –
318: <a href="association-of-controls-and-forms.html">4.10.18 Association of controls and forms →</a>
319: <ol class="toc"><li><ol><li><ol><li><a href="the-button-element.html#the-button-element" id="x4.10.8-the-button-element"><span class="secno">4.10.8 </span>The <code>button</code> element</a><li><a href="the-button-element.html#the-select-element" id="x4.10.9-the-select-element"><span class="secno">4.10.9 </span>The <code>select</code> element</a><li><a href="the-button-element.html#the-datalist-element" id="x4.10.10-the-datalist-element"><span class="secno">4.10.10 </span>The <code>datalist</code> element</a><li><a href="the-button-element.html#the-optgroup-element" id="x4.10.11-the-optgroup-element"><span class="secno">4.10.11 </span>The <code>optgroup</code> element</a><li><a href="the-button-element.html#the-option-element" id="x4.10.12-the-option-element"><span class="secno">4.10.12 </span>The <code>option</code> element</a><li><a href="the-button-element.html#the-textarea-element" id="x4.10.13-the-textarea-element"><span class="secno">4.10.13 </span>The <code>textarea</code> element</a><li><a href="the-button-element.html#the-keygen-element" id="x4.10.14-the-keygen-element"><span class="secno">4.10.14 </span>The <code>keygen</code> element</a><li><a href="the-button-element.html#the-output-element" id="x4.10.15-the-output-element"><span class="secno">4.10.15 </span>The <code>output</code> element</a><li><a href="the-button-element.html#the-progress-element" id="x4.10.16-the-progress-element"><span class="secno">4.10.16 </span>The <code>progress</code> element</a><li><a href="the-button-element.html#the-meter-element" id="x4.10.17-the-meter-element"><span class="secno">4.10.17 </span>The <code>meter</code> element</a></ol></ol></ol></div>
1.156 mike 320:
1.202 mike 321: <h4 id="the-button-element"><span class="secno">4.10.8 </span>The <dfn><code>button</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.258 mike 322: <dd><a href="content-models.html#flow-content" id="flow-content-123">Flow content</a>.</dd>
323: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-130">Phrasing content</a>.</dd>
1.156 mike 324: <dd><a href="content-models.html#interactive-content" id="interactive-content-14">Interactive content</a>.</dd>
1.202 mike 325: <dd><a href="forms.html#category-listed" id="category-listed-5" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-3" title="category-label">labelable</a>, and <a href="forms.html#category-submit" id="category-submit-4" title="category-submit">submittable</a> <a href="forms.html#form-associated-element" id="form-associated-element-9">form-associated element</a>.</dd>
1.203 mike 326: <dt>Contexts in which this element can be used:</dt>
1.258 mike 327: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-131">phrasing content</a> is expected.</dd>
1.9 mike 328: <dt>Content model:</dt>
1.258 mike 329: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-132">Phrasing content</a>, but there must be no <a href="content-models.html#interactive-content" id="interactive-content-15">interactive content</a> descendant.</dd>
1.9 mike 330: <dt>Content attributes:</dt>
1.258 mike 331: <dd><a href="elements.html#global-attributes" id="global-attributes-86">Global attributes</a></dd>
1.156 mike 332: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-1">autofocus</a></code></dd>
333: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-12">disabled</a></code></dd>
1.262 mike 334: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-49">form</a></code></dd>
1.156 mike 335: <dd><code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction" id="formaction-26">formaction</a></code></dd>
336: <dd><code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype" id="formenctype-26">formenctype</a></code></dd>
337: <dd><code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod" id="formmethod-26">formmethod</a></code></dd>
338: <dd><code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate" id="formnovalidate-27">formnovalidate</a></code></dd>
339: <dd><code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget" id="formtarget-26">formtarget</a></code></dd>
340: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-37">name</a></code></dd>
1.213 mike 341: <dd><code title="attr-button-type"><a href="#attr-button-type" id="type-75">type</a></code></dd>
1.255 mike 342: <dd><code title="attr-button-value"><a href="#attr-button-value" id="value-30">value</a></code></dd>
1.9 mike 343: <dt>DOM interface:</dt>
344: <dd>
1.258 mike 345: <pre class="idl">interface <dfn id="htmlbuttonelement">HTMLButtonElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-94">HTMLElement</a> {
1.162 mike 346: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-autofocus" title='Read about this "autofocus" reference in the full HTML5 spec.'>autofocus</a>;
347: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
348: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-5">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
349: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formaction" title='Read about this "formAction" reference in the full HTML5 spec.'>formAction</a>;
350: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formenctype" title='Read about this "formEnctype" reference in the full HTML5 spec.'>formEnctype</a>;
351: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formmethod" title='Read about this "formMethod" reference in the full HTML5 spec.'>formMethod</a>;
352: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formnovalidate" title='Read about this "formNoValidate" reference in the full HTML5 spec.'>formNoValidate</a>;
353: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fs-formtarget" title='Read about this "formTarget" reference in the full HTML5 spec.'>formTarget</a>;
354: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
355: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-button-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
356: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-button-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
357:
358: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
359: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
360: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
361: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
362: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
1.9 mike 363:
1.162 mike 364: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.9 mike 365: };</pre>
366: </dd>
1.162 mike 367: </dl><p>The <code><a href="#the-button-element" id="button-11">button</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a
1.160 mike 368: button. <p>The element is a <a href="forms.html#concept-button" id="concept-button-4" title="concept-button">button</a>.<p>The <dfn id="attr-button-type" title="attr-button-type"><code>type</code></dfn>
1.9 mike 369: attribute controls the behavior of the button when it is activated.
1.156 mike 370: It is an <a href="common-microsyntaxes.html#enumerated-attribute" id="enumerated-attribute-8">enumerated attribute</a>. The following table
1.160 mike 371: lists the keywords and states for the attribute — the keywords
1.9 mike 372: in the left column map to the states in the cell in the second
1.160 mike 373: column on the same row as the keyword.<table><thead><tr><th> Keyword
374: <th> State
375: <th> Brief description
376: <tbody><tr><td><dfn id="attr-button-type-submit" title="attr-button-type-submit"><code>submit</code></dfn>
1.162 mike 377: <td><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
1.160 mike 378: <td>Submits the form.
379: <tr><td><dfn id="attr-button-type-reset" title="attr-button-type-reset"><code>reset</code></dfn>
1.162 mike 380: <td><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-reset-state" title='Read about this "Reset Button" reference in the full HTML5 spec.'>Reset Button</a>
1.160 mike 381: <td>Resets the form.
382: <tr><td><dfn id="attr-button-type-button" title="attr-button-type-button"><code>button</code></dfn>
1.162 mike 383: <td><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-button-state" title='Read about this "Button" reference in the full HTML5 spec.'>Button</a>
1.160 mike 384: <td>Does nothing.
1.162 mike 385: </table><p>The <i>missing value default</i> is the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
1.213 mike 386: state.<p>If the <code title="attr-button-type"><a href="#attr-button-type" id="type-76">type</a></code> attribute is in
1.162 mike 387: the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
1.262 mike 388: state, the element is specifically a <a href="forms.html#concept-submit-button" id="concept-submit-button-2" title="concept-submit-button">submit button</a>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-50">form</a></code> attribute is used to
1.156 mike 389: explicitly associate the <code><a href="#the-button-element" id="button-12">button</a></code> element with its
390: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-8">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-38">name</a></code>
391: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-13">disabled</a></code> attribute is used to make
1.9 mike 392: the control non-interactive and to prevent its value from being
1.156 mike 393: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-2">autofocus</a></code>
394: attribute controls focus. The <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction" id="formaction-27">formaction</a></code>, <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype" id="formenctype-27">formenctype</a></code>, <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod" id="formmethod-27">formmethod</a></code>, <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate" id="formnovalidate-28">formnovalidate</a></code>, and <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget" id="formtarget-27">formtarget</a></code> attributes are
1.160 mike 395: <a href="association-of-controls-and-forms.html#attributes-for-form-submission" id="attributes-for-form-submission-3">attributes for form submission</a>.<p class="note">The <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate" id="formnovalidate-29">formnovalidate</a></code> attribute can
1.9 mike 396: be used to make submit buttons that do not trigger the constraint
1.160 mike 397: validation.<p>The <code title="attr-fs-formaction"><a href="association-of-controls-and-forms.html#attr-fs-formaction" id="formaction-28">formaction</a></code>, <code title="attr-fs-formenctype"><a href="association-of-controls-and-forms.html#attr-fs-formenctype" id="formenctype-28">formenctype</a></code>, <code title="attr-fs-formmethod"><a href="association-of-controls-and-forms.html#attr-fs-formmethod" id="formmethod-28">formmethod</a></code>, <code title="attr-fs-formnovalidate"><a href="association-of-controls-and-forms.html#attr-fs-formnovalidate" id="formnovalidate-30">formnovalidate</a></code>, and <code title="attr-fs-formtarget"><a href="association-of-controls-and-forms.html#attr-fs-formtarget" id="formtarget-28">formtarget</a></code> must not be specified
1.213 mike 398: if the element's <code title="attr-button-type"><a href="#attr-button-type" id="type-77">type</a></code>
1.162 mike 399: attribute is not in the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#attr-button-type-submit-state" title='Read about this "Submit Button" reference in the full HTML5 spec.'>Submit Button</a>
1.160 mike 400: state.<p>The <dfn id="attr-button-value" title="attr-button-value"><code>value</code></dfn>
1.9 mike 401: attribute gives the element's value for the purposes of form
1.162 mike 402: submission. The element's <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#concept-fe-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a> is the value of the element's
1.255 mike 403: <code title="attr-button-value"><a href="#attr-button-value" id="value-31">value</a></code> attribute, if there is
1.160 mike 404: one, or the empty string otherwise.<p class="note">A button (and its value) is only included in the
1.9 mike 405: form submission if the button itself was used to initiate the form
1.160 mike 406: submission.<div class="example">
1.9 mike 407:
408: <p>The following button is labeled "Show hint" and pops up a dialog
409: box when activated:</p>
410:
411: <pre><button type=button
412: onclick="alert('This 15-20 minute piece was composed by George Gershwin.')">
413: Show hint
414: </button></pre>
415:
1.202 mike 416: </div><h4 id="the-select-element"><span class="secno">4.10.9 </span>The <dfn><code>select</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.258 mike 417: <dd><a href="content-models.html#flow-content" id="flow-content-124">Flow content</a>.</dd>
418: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-133">Phrasing content</a>.</dd>
1.156 mike 419: <dd><a href="content-models.html#interactive-content" id="interactive-content-16">Interactive content</a>.</dd>
1.202 mike 420: <dd><a href="forms.html#category-listed" id="category-listed-6" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-4" title="category-label">labelable</a>, <a href="forms.html#category-submit" id="category-submit-5" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" id="category-reset-2" title="category-reset">resettable</a> <a href="forms.html#form-associated-element" id="form-associated-element-10">form-associated element</a>.</dd>
1.203 mike 421: <dt>Contexts in which this element can be used:</dt>
1.258 mike 422: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-134">phrasing content</a> is expected.</dd>
1.9 mike 423: <dt>Content model:</dt>
1.191 mike 424: <dd>Zero or more <code><a href="#the-option-element" id="option-9">option</a></code> or <code><a href="#the-optgroup-element" id="optgroup-3">optgroup</a></code> elements.</dd>
1.9 mike 425: <dt>Content attributes:</dt>
1.258 mike 426: <dd><a href="elements.html#global-attributes" id="global-attributes-87">Global attributes</a></dd>
1.156 mike 427: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-3">autofocus</a></code></dd>
428: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-14">disabled</a></code></dd>
1.262 mike 429: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-51">form</a></code></dd>
1.156 mike 430: <dd><code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-29">multiple</a></code></dd>
431: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-39">name</a></code></dd>
1.234 mike 432: <dd><code title="attr-select-required"><a href="#attr-select-required" id="required-28">required</a></code></dd>
1.156 mike 433: <dd><code title="attr-select-size"><a href="#attr-select-size" id="size-30">size</a></code></dd>
1.9 mike 434: <dt>DOM interface:</dt>
435: <dd>
1.258 mike 436: <pre class="idl">interface <dfn id="htmlselectelement">HTMLSelectElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-95">HTMLElement</a> {
1.162 mike 437: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-autofocus" title='Read about this "autofocus" reference in the full HTML5 spec.'>autofocus</a>;
438: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
439: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-6">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
440: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-multiple" title='Read about this "multiple" reference in the full HTML5 spec.'>multiple</a>;
441: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
1.165 mike 442: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-required" title='Read about this "required" reference in the full HTML5 spec.'>required</a>;
1.162 mike 443: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-size" title='Read about this "size" reference in the full HTML5 spec.'>size</a>;
1.160 mike 444:
1.162 mike 445: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
1.160 mike 446:
1.162 mike 447: readonly attribute <a href="urls.html#htmloptionscollection" id="htmloptionscollection-3">HTMLOptionsCollection</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a>;
448: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-length" title='Read about this "length" reference in the full HTML5 spec.'>length</a>;
449: caller getter any <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-item" title='Read about this "item" reference in the full HTML5 spec.'>item</a>(in unsigned long index);
450: caller getter any <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-nameditem" title='Read about this "namedItem" reference in the full HTML5 spec.'>namedItem</a>(in DOMString name);
1.258 mike 451: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-add" title='Read about this "add" reference in the full HTML5 spec.'>add</a>(in <a href="elements.html#htmlelement" id="htmlelement-96">HTMLElement</a> element, in optional <a href="elements.html#htmlelement" id="htmlelement-97">HTMLElement</a> before);
452: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-add" title='Read about this "add" reference in the full HTML5 spec.'>add</a>(in <a href="elements.html#htmlelement" id="htmlelement-98">HTMLElement</a> element, in long before);
1.162 mike 453: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-remove" title='Read about this "remove" reference in the full HTML5 spec.'>remove</a>(in long index);
454:
1.202 mike 455: readonly attribute <a href="urls.html#htmlcollection" id="htmlcollection-34">HTMLCollection</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedoptions" title='Read about this "selectedOptions" reference in the full HTML5 spec.'>selectedOptions</a>;
1.162 mike 456: attribute long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedindex" title='Read about this "selectedIndex" reference in the full HTML5 spec.'>selectedIndex</a>;
457: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
458:
459: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
460: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
461: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
462: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
463: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
1.9 mike 464:
1.162 mike 465: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.9 mike 466: };</pre>
467: </dd>
468: </dl><!-- Proposals for v2:
469: * <select value=""> as an alternative to <option selected>
470: http://developers.slashdot.org/comments.pl?sid=426306&cid=22142072
1.11 mike 471: <Philip`> http://www.ipiao.com.cn/ does <select size="1" name="to"><script type="text/javascript">City_Default="PEK"</script><SCRIPT language=javascript
1.9 mike 472: src="/js/flightcity.js"></SCRIPT></select> which is the kind of thing that could be much simpler with <select value="PEK">
1.234 mike 473: --><p>The <code><a href="#the-select-element" id="select-18">select</a></code> element represents a control for
1.160 mike 474: selecting amongst a set of options.<p>The <dfn id="attr-select-multiple" title="attr-select-multiple"><code>multiple</code></dfn>
1.156 mike 475: attribute is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-13">boolean attribute</a>. If the attribute is
1.234 mike 476: present, then the <code><a href="#the-select-element" id="select-19">select</a></code> element
1.162 mike 477: <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a control for selecting zero or more options
1.156 mike 478: from the <a href="#concept-select-option-list" id="concept-select-option-list-1" title="concept-select-option-list">list of
1.9 mike 479: options</a>. If the attribute is absent, then the
1.234 mike 480: <code><a href="#the-select-element" id="select-20">select</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a control for
1.160 mike 481: selecting a single option from the <a href="#concept-select-option-list" id="concept-select-option-list-2" title="concept-select-option-list">list of options</a>.<p>The <dfn id="attr-select-size" title="attr-select-size"><code>size</code></dfn>
1.156 mike 482: attribute gives the number of options to show to the user. The <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size" id="size-26">size</a></code> attribute, if specified, must
483: have a value that is a <a href="common-microsyntaxes.html#valid-non-negative-integer" id="valid-non-negative-integer-10">valid non-negative integer</a>
484: greater than zero. If the <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-30">multiple</a></code> attribute is present,
485: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size" id="size-27">size</a></code> attribute's
486: default value is 4. If the <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-31">multiple</a></code> attribute is absent,
487: then the <code title="attr-input-size"><a href="common-input-element-attributes.html#attr-input-size" id="size-28">size</a></code> attribute's
1.160 mike 488: default value is 1.<p>The <dfn id="concept-select-option-list" title="concept-select-option-list">list of options</dfn>
1.234 mike 489: for a <code><a href="#the-select-element" id="select-21">select</a></code> element consists of all the
490: <code><a href="#the-option-element" id="option-10">option</a></code> element children of the <code><a href="#the-select-element" id="select-22">select</a></code>
1.191 mike 491: element, and all the <code><a href="#the-option-element" id="option-11">option</a></code> element children of all the
1.234 mike 492: <code><a href="#the-optgroup-element" id="optgroup-4">optgroup</a></code> element children of the <code><a href="#the-select-element" id="select-23">select</a></code>
1.160 mike 493: element, in <a href="infrastructure.html#tree-order" id="tree-order-5">tree order</a>.<p>The <dfn id="attr-select-required" title="attr-select-required"><code>required</code></dfn>
1.156 mike 494: attribute is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-14">boolean attribute</a>. When specified, the
1.138 mike 495: user will be required to select a value before submitting the
1.234 mike 496: form.<p>If a <code><a href="#the-select-element" id="select-24">select</a></code> element has a <code title="attr-select-required"><a href="#attr-select-required" id="required-29">required</a></code> attribute specified,
1.156 mike 497: does not have a <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-32">multiple</a></code>
1.162 mike 498: attribute specified, and has a <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-select-size" title='Read about this "display size" reference in the full HTML5 spec.'>display size</a> of 1; and if the
1.156 mike 499: <a href="#concept-option-value" id="concept-option-value-0" title="concept-option-value">value</a> of the first
1.234 mike 500: <code><a href="#the-option-element" id="option-12">option</a></code> element in the <code><a href="#the-select-element" id="select-25">select</a></code> element's
1.156 mike 501: <a href="#concept-select-option-list" id="concept-select-option-list-3" title="concept-select-option-list">list of options</a> (if
1.191 mike 502: any) is the empty string, and that <code><a href="#the-option-element" id="option-13">option</a></code> is not <a href="#concept-option-disabled" id="concept-option-disabled-0" title="concept-option-disabled">disabled</a>, and, finally, that
1.234 mike 503: <code><a href="#the-option-element" id="option-14">option</a></code> element's parent node is the <code><a href="#the-select-element" id="select-26">select</a></code>
1.190 mike 504: element (and not an <code><a href="#the-optgroup-element" id="optgroup-5">optgroup</a></code> element), then that
1.234 mike 505: <code><a href="#the-option-element" id="option-15">option</a></code> is the <code><a href="#the-select-element" id="select-27">select</a></code> element's
1.262 mike 506: <dfn id="placeholder-label-option">placeholder label option</dfn>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-52">form</a></code> attribute is used to
1.234 mike 507: explicitly associate the <code><a href="#the-select-element" id="select-28">select</a></code> element with its
1.156 mike 508: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-9">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-40">name</a></code>
509: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-15">disabled</a></code> attribute is used to make
1.9 mike 510: the control non-interactive and to prevent its value from being
1.156 mike 511: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-4">autofocus</a></code>
1.162 mike 512: attribute controls focus.<dl class="domintro"><dt><var title="">select</var> . <code title="dom-select-type"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a></code></dt>
1.9 mike 513:
514: <dd>
515:
516: <p>Returns "<code title="">select-multiple</code>" if the element
1.156 mike 517: has a <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-33">multiple</a></code>
1.9 mike 518: attribute, and "<code title="">select-one</code>"
519: otherwise.</p>
520:
521: </dd>
522:
1.162 mike 523: <dt><var title="">select</var> . <code title="dom-select-options"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a></code></dt>
1.9 mike 524:
525: <dd>
526:
1.156 mike 527: <p>Returns an <code><a href="urls.html#htmloptionscollection" id="htmloptionscollection-4">HTMLOptionsCollection</a></code> of the <a href="#concept-select-option-list" id="concept-select-option-list-4" title="concept-select-option-list">list of options</a>.</p>
1.9 mike 528:
529: </dd>
530:
1.162 mike 531: <dt><var title="">select</var> . <code title="dom-select-length"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-length" title='Read about this "length" reference in the full HTML5 spec.'>length</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 532: <dd>
1.156 mike 533: <p>Returns the number of elements in the <a href="#concept-select-option-list" id="concept-select-option-list-5" title="concept-select-option-list">list of options</a>.</p>
1.234 mike 534: <p>When set to a smaller number, truncates the number of <code><a href="#the-option-element" id="option-16">option</a></code> elements in the <code><a href="#the-select-element" id="select-29">select</a></code>.</p>
535: <p>When set to a greater number, adds new blank <code><a href="#the-option-element" id="option-17">option</a></code> elements to the <code><a href="#the-select-element" id="select-30">select</a></code>.</p>
1.9 mike 536: </dd>
537:
1.162 mike 538: <dt><var title="">element</var> = <var title="">select</var> . <code title="dom-select-item"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-item" title='Read about this "item" reference in the full HTML5 spec.'>item</a></code>(<var title="">index</var>)</dt>
1.9 mike 539: <dt><var title="">select</var>[<var title="">index</var>]</dt>
540: <dt><var title="">select</var>(<var title="">index</var>)</dt>
541: <dd>
1.156 mike 542: <p>Returns the item with index <var title="">index</var> from the <a href="#concept-select-option-list" id="concept-select-option-list-6" title="concept-select-option-list">list of options</a>. The items are sorted in <a href="infrastructure.html#tree-order" id="tree-order-6">tree order</a>.</p>
1.9 mike 543: <p>Returns null if <var title="">index</var> is out of range.</p>
544: </dd>
545:
1.162 mike 546: <dt><var title="">element</var> = <var title="">select</var> . <code title="dom-select-item"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-item" title='Read about this "namedItem" reference in the full HTML5 spec.'>namedItem</a></code>(<var title="">name</var>)</dt>
1.9 mike 547: <dt><var title="">select</var>[<var title="">name</var>]</dt>
548: <dt><var title="">select</var>(<var title="">name</var>)</dt>
549: <dd>
1.201 mike 550: <p>Returns the item with <a href="elements.html#concept-id" id="concept-id-17" title="concept-id">ID</a> or <code title="attr-option-name"><a href="obsolete.html#attr-option-name" id="name-59">name</a></code> <var title="">name</var> from the <a href="#concept-select-option-list" id="concept-select-option-list-7" title="concept-select-option-list">list of options</a>.</p>
1.162 mike 551: <p>If there are multiple matching items, then a <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a></code> object containing all those elements is returned.</p>
1.201 mike 552: <p>Returns null if no element with that <a href="elements.html#concept-id" id="concept-id-18" title="concept-id">ID</a> could be found.</p>
1.9 mike 553: </dd>
554:
1.162 mike 555: <dt><var title="">select</var> . <code title="dom-select-add"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-add" title='Read about this "add" reference in the full HTML5 spec.'>add</a></code>(<var title="">element</var> [, <var title="">before</var> ])</dt>
1.9 mike 556: <dd>
557: <p>Inserts <var title="">element</var> before the node given by <var title="">before</var>.</p>
558: <p>The <var title="">before</var> argument can be a number, in
559: which case <var title="">element</var> is inserted before the item
1.156 mike 560: with that number, or an element from the <a href="#concept-select-option-list" id="concept-select-option-list-8" title="concept-select-option-list">list of options</a>, in
1.9 mike 561: which case <var title="">element</var> is inserted before that
562: element.</p>
563: <p>If <var title="">before</var> is omitted, null, or a number out
564: of range, then <var title="">element</var> will be added at the
565: end of the list.</p>
1.156 mike 566: <p>This method will throw a <code><a href="urls.html#hierarchy_request_err" id="hierarchy_request_err-5">HIERARCHY_REQUEST_ERR</a></code>
1.9 mike 567: exception if <var title="">element</var> is an ancestor of the
1.191 mike 568: element into which it is to be inserted. If <var title="">element</var> is not an <code><a href="#the-option-element" id="option-18">option</a></code> or
1.190 mike 569: <code><a href="#the-optgroup-element" id="optgroup-6">optgroup</a></code> element, then the method does nothing.</p>
1.9 mike 570: </dd>
571:
1.162 mike 572: <dt><var title="">select</var> . <code title="dom-select-selectedOptions"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedoptions" title='Read about this "selectedOptions" reference in the full HTML5 spec.'>selectedOptions</a></code></dt>
1.9 mike 573:
574: <dd>
575:
1.202 mike 576: <p>Returns an <code><a href="urls.html#htmlcollection" id="htmlcollection-35">HTMLCollection</a></code> of the <a href="#concept-select-option-list" id="concept-select-option-list-9" title="concept-select-option-list">list of options</a> that are
1.9 mike 577: selected.</p>
578:
579: </dd>
580:
1.162 mike 581: <dt><var title="">select</var> . <code title="dom-select-selectedIndex"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-selectedindex" title='Read about this "selectedIndex" reference in the full HTML5 spec.'>selectedIndex</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 582:
583: <dd>
584:
585: <p>Returns the index of the first selected item, if any, or
1.160 mike 586: −1 if there is no selected item.</p>
1.9 mike 587:
588: <p>Can be set, to change the selection.</p>
589:
590: </dd>
591:
1.162 mike 592: <dt><var title="">select</var> . <code title="dom-select-value"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 593:
594: <dd>
595:
1.162 mike 596: <p>Returns the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#concept-fe-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a> of the
1.9 mike 597: first selected item, if any, or the empty string if there is no
598: selected item.</p>
599:
600: <p>Can be set, to change the selection.</p>
601:
602: </dd>
603:
604: </dl><div class="example">
605:
1.234 mike 606: <p>The following example shows how a <code><a href="#the-select-element" id="select-31">select</a></code> element
1.9 mike 607: can be used to offer the user with a set of options from which the
608: user can select a single option. The default option is
609: preselected.</p>
610:
611: <pre><p>
612: <label for="unittype">Select unit type:</label>
613: <select id="unittype" name="unittype">
614: <option value="1"> Miner </option>
615: <option value="2"> Puffer </option>
616: <option value="3" selected> Snipey </option>
617: <option value="4"> Max </option>
618: <option value="5"> Firebot </option>
619: </select>
620: </p></pre>
621:
622: </div><div class="example">
623:
624: <p>Here, the user is offered a set of options from which he can
625: select any number. By default, all five options are selected.</p>
626:
627: <pre><p>
628: <label for="allowedunits">Select unit types to enable on this map:</label>
629: <select id="allowedunits" name="allowedunits" multiple>
630: <option value="1" selected> Miner </option>
631: <option value="2" selected> Puffer </option>
632: <option value="3" selected> Snipey </option>
633: <option value="4" selected> Max </option>
634: <option value="5" selected> Firebot </option>
635: </select>
636: </p></pre>
637:
1.202 mike 638: </div><h4 id="the-datalist-element"><span class="secno">4.10.10 </span>The <dfn><code>datalist</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.258 mike 639: <dd><a href="content-models.html#flow-content" id="flow-content-125">Flow content</a>.</dd>
640: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-135">Phrasing content</a>.</dd>
1.203 mike 641: <dt>Contexts in which this element can be used:</dt>
1.258 mike 642: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-136">phrasing content</a> is expected.</dd>
1.9 mike 643: <dt>Content model:</dt>
1.258 mike 644: <dd>Either: <a href="content-models.html#phrasing-content" id="phrasing-content-137">phrasing content</a>.</dd>
1.191 mike 645: <dd>Or: Zero or more <code><a href="#the-option-element" id="option-19">option</a></code> elements.</dd>
1.9 mike 646: <dt>Content attributes:</dt>
1.258 mike 647: <dd><a href="elements.html#global-attributes" id="global-attributes-88">Global attributes</a></dd>
1.9 mike 648: <dt>DOM interface:</dt>
649: <dd>
1.258 mike 650: <pre class="idl">interface <dfn id="htmldatalistelement">HTMLDataListElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-99">HTMLElement</a> {
1.202 mike 651: readonly attribute <a href="urls.html#htmlcollection" id="htmlcollection-36">HTMLCollection</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-datalist-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a>;
1.9 mike 652: };</pre>
653: </dd>
1.156 mike 654: </dl><p>The <code><a href="#the-datalist-element" id="datalist-13">datalist</a></code> element represents a set of
1.191 mike 655: <code><a href="#the-option-element" id="option-20">option</a></code> elements that represent predefined options for
1.9 mike 656: other controls. The contents of the element represents fallback
1.191 mike 657: content for legacy user agents, intermixed with <code><a href="#the-option-element" id="option-21">option</a></code>
1.9 mike 658: elements that represent the predefined options. In the rendering,
1.162 mike 659: the <code><a href="#the-datalist-element" id="datalist-14">datalist</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a>
1.160 mike 660: nothing.<p>The <code><a href="#the-datalist-element" id="datalist-15">datalist</a></code> element is hooked up to an
1.234 mike 661: <code><a href="the-input-element.html#the-input-element" id="input-117">input</a></code> element using the <code title="attr-input-list"><a href="common-input-element-attributes.html#attr-input-list" id="list-29">list</a></code> attribute on the
662: <code><a href="the-input-element.html#the-input-element" id="input-118">input</a></code> element. <!-- v2DATAGRID The
1.9 mike 663: <code>datalist</code> element can also be used with a
664: <code>datagrid</code> element, as the source of autocompletion hints
665: for <code title="datagrid-type-editable">editable</code>
1.191 mike 666: cells. --><p>Each <code><a href="#the-option-element" id="option-22">option</a></code> element that is a descendant of the
1.156 mike 667: <code><a href="#the-datalist-element" id="datalist-16">datalist</a></code> element, that is not <a href="#concept-option-disabled" id="concept-option-disabled-1" title="concept-option-disabled">disabled</a>, and whose <a href="#concept-option-value" id="concept-option-value-1" title="concept-option-value">value</a> is a string that isn't the
668: empty string, represents a suggestion. Each suggestion has a <a href="#concept-option-value" id="concept-option-value-2" title="concept-option-value">value</a> and a <a href="#concept-option-label" id="concept-option-label-0" title="concept-option-label">label</a>.
1.9 mike 669:
1.162 mike 670: <dl class="domintro"><dt><var title="">datalist</var> . <code title="dom-datalist-options"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-datalist-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a></code></dt>
1.9 mike 671:
672: <dd>
1.202 mike 673: <p>Returns an <code><a href="urls.html#htmlcollection" id="htmlcollection-37">HTMLCollection</a></code> of the <code>options</code> elements of the table.</p>
1.9 mike 674: </dd>
675:
1.202 mike 676: </dl><h4 id="the-optgroup-element"><span class="secno">4.10.11 </span>The <dfn><code>optgroup</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.9 mike 677: <dd>None.</dd>
1.203 mike 678: <dt>Contexts in which this element can be used:</dt>
1.234 mike 679: <dd>As a child of a <code><a href="#the-select-element" id="select-32">select</a></code> element.</dd>
1.9 mike 680: <dt>Content model:</dt>
1.191 mike 681: <dd>Zero or more <code><a href="#the-option-element" id="option-23">option</a></code> elements.</dd>
1.9 mike 682: <dt>Content attributes:</dt>
1.258 mike 683: <dd><a href="elements.html#global-attributes" id="global-attributes-89">Global attributes</a></dd>
1.156 mike 684: <dd><code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled" id="disabled-3">disabled</a></code></dd>
1.203 mike 685: <dd><code title="attr-optgroup-label"><a href="#attr-optgroup-label" id="label-27">label</a></code></dd>
1.9 mike 686: <dt>DOM interface:</dt>
687: <dd>
1.258 mike 688: <pre class="idl">interface <dfn id="htmloptgroupelement">HTMLOptGroupElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-100">HTMLElement</a> {
1.162 mike 689: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-optgroup-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
690: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-optgroup-label" title='Read about this "label" reference in the full HTML5 spec.'>label</a>;
1.9 mike 691: };</pre>
692: </dd>
1.190 mike 693: </dl><!-- v2: make optgroups selectable if they have a value. --><p>The <code><a href="#the-optgroup-element" id="optgroup-7">optgroup</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a group of
1.191 mike 694: <code><a href="#the-option-element" id="option-24">option</a></code> elements with a common label.<p>The element's group of <code><a href="#the-option-element" id="option-25">option</a></code> elements consists of
695: the <code><a href="#the-option-element" id="option-26">option</a></code> elements that are children of the
1.190 mike 696: <code><a href="#the-optgroup-element" id="optgroup-8">optgroup</a></code> element.<p>The <dfn id="attr-optgroup-disabled" title="attr-optgroup-disabled"><code>disabled</code></dfn> attribute
1.156 mike 697: is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-15">boolean attribute</a> and can be used to <a href="#concept-option-disabled" id="concept-option-disabled-2" title="concept-option-disabled">disable</a> a group of
1.191 mike 698: <code><a href="#the-option-element" id="option-27">option</a></code> elements together.<p>The <dfn id="attr-optgroup-label" title="attr-optgroup-label"><code>label</code></dfn>
1.9 mike 699: attribute must be specified. Its value gives the name of the group,
1.160 mike 700: for the purposes of the user interface. <div class="example">
1.9 mike 701:
702: <p>The following snippet shows how a set of lessons from three
1.234 mike 703: courses could be offered in a <code><a href="#the-select-element" id="select-33">select</a></code> drop-down
1.9 mike 704: widget:</p>
705:
706: <pre><form action="courseselector.dll" method="get">
707: <p>Which course would you like to watch today?
708: <p><label>Course:
709: <select name="c">
710: <optgroup label="8.01 Physics I: Classical Mechanics">
711: <option value="8.01.1">Lecture 01: Powers of Ten
712: <option value="8.01.2">Lecture 02: 1D Kinematics
713: <option value="8.01.3">Lecture 03: Vectors
714: <optgroup label="8.02 Electricity and Magnestism">
715: <option value="8.02.1">Lecture 01: What holds our world together?
716: <option value="8.02.2">Lecture 02: Electric Field
717: <option value="8.02.3">Lecture 03: Electric Flux
718: <optgroup label="8.03 Physics III: Vibrations and Waves">
719: <option value="8.03.1">Lecture 01: Periodic Phenomenon
720: <option value="8.03.2">Lecture 02: Beats
721: <option value="8.03.3">Lecture 03: Forced Oscillations with Damping
722: </select>
723: </label>
1.55 mike 724: <p><input type=submit value="▶ Play">
1.9 mike 725: </form></pre>
726:
1.202 mike 727: </div><h4 id="the-option-element"><span class="secno">4.10.12 </span>The <dfn><code>option</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.9 mike 728: <dd>None.</dd>
1.203 mike 729: <dt>Contexts in which this element can be used:</dt>
1.234 mike 730: <dd>As a child of a <code><a href="#the-select-element" id="select-34">select</a></code> element.</dd>
1.156 mike 731: <dd>As a child of a <code><a href="#the-datalist-element" id="datalist-17">datalist</a></code> element.</dd>
1.190 mike 732: <dd>As a child of an <code><a href="#the-optgroup-element" id="optgroup-9">optgroup</a></code> element.</dd>
1.9 mike 733: <dt>Content model:</dt>
1.156 mike 734: <dd><a href="content-models.html#text-content" id="text-content-4" title="text content">Text</a>.</dd>
1.9 mike 735: <dt>Content attributes:</dt>
1.258 mike 736: <dd><a href="elements.html#global-attributes" id="global-attributes-90">Global attributes</a></dd>
1.156 mike 737: <dd><code title="attr-option-disabled"><a href="#attr-option-disabled" id="disabled-6">disabled</a></code></dd>
1.203 mike 738: <dd><code title="attr-option-label"><a href="#attr-option-label" id="label-29">label</a></code></dd>
1.156 mike 739: <dd><code title="attr-option-selected"><a href="#attr-option-selected" id="selected-0">selected</a></code></dd>
1.255 mike 740: <dd><code title="attr-option-value"><a href="#attr-option-value" id="value-34">value</a></code></dd>
1.9 mike 741: <dt>DOM interface:</dt>
742: <dd>
1.162 mike 743: <pre class="idl">[NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(),
744: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-t" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text),
745: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-tv" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text, in DOMString value),
746: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-tvd" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected),
747: NamedConstructor=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-tvds" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a>(in DOMString text, in DOMString value, in boolean defaultSelected, in boolean selected)]
1.258 mike 748: interface <dfn id="htmloptionelement">HTMLOptionElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-101">HTMLElement</a> {
1.162 mike 749: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
750: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-7">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
751: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-label" title='Read about this "label" reference in the full HTML5 spec.'>label</a>;
752: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-defaultselected" title='Read about this "defaultSelected" reference in the full HTML5 spec.'>defaultSelected</a>;
753: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-selected" title='Read about this "selected" reference in the full HTML5 spec.'>selected</a>;
754: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1.9 mike 755:
1.162 mike 756: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-text" title='Read about this "text" reference in the full HTML5 spec.'>text</a>;
757: readonly attribute long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-index" title='Read about this "index" reference in the full HTML5 spec.'>index</a>;
1.9 mike 758: };</pre>
759: </dd>
1.191 mike 760: </dl><p>The <code><a href="#the-option-element" id="option-28">option</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> an option
1.234 mike 761: in a <code><a href="#the-select-element" id="select-35">select</a></code> element or as part of a list of suggestions
1.160 mike 762: in a <code><a href="#the-datalist-element" id="datalist-18">datalist</a></code> element.<p>In certain circumstances described in the definition of the
1.234 mike 763: <code><a href="#the-select-element" id="select-36">select</a></code> element, an <code><a href="#the-option-element" id="option-29">option</a></code> element can be a
764: <code><a href="#the-select-element" id="select-37">select</a></code> element's <a href="#placeholder-label-option" id="placeholder-label-option-0">placeholder label option</a>.
1.156 mike 765: A <a href="#placeholder-label-option" id="placeholder-label-option-1">placeholder label option</a> does not represent an actual
1.234 mike 766: option, but instead represents a label for the <code><a href="#the-select-element" id="select-38">select</a></code>
1.160 mike 767: control.<p>The <dfn id="attr-option-disabled" title="attr-option-disabled"><code>disabled</code></dfn>
1.156 mike 768: attribute is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-16">boolean attribute</a>. An
1.191 mike 769: <code><a href="#the-option-element" id="option-30">option</a></code> element is <dfn id="concept-option-disabled" title="concept-option-disabled">disabled</dfn> if its <code title="attr-option-disabled"><a href="#attr-option-disabled" id="disabled-7">disabled</a></code> attribute is present or
1.190 mike 770: if it is a child of an <code><a href="#the-optgroup-element" id="optgroup-10">optgroup</a></code> element whose <code title="attr-optgroup-disabled"><a href="#attr-optgroup-disabled" id="disabled-4">disabled</a></code> attribute is
1.160 mike 771: present.<p>The <dfn id="attr-option-label" title="attr-option-label"><code>label</code></dfn>
1.191 mike 772: attribute provides a label for element. The <dfn id="concept-option-label" title="concept-option-label">label</dfn> of an <code><a href="#the-option-element" id="option-31">option</a></code>
1.203 mike 773: element is the value of the <code title="attr-option-label"><a href="#attr-option-label" id="label-30">label</a></code> attribute, if there is one,
1.162 mike 774: or the <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code> of the element, if there isn't.<p>The <dfn id="attr-option-value" title="attr-option-value"><code>value</code></dfn>
1.191 mike 775: attribute provides a value for element. The <dfn id="concept-option-value" title="concept-option-value">value</dfn> of an <code><a href="#the-option-element" id="option-32">option</a></code>
1.255 mike 776: element is the value of the <code title="attr-option-value"><a href="#attr-option-value" id="value-35">value</a></code> attribute, if there is one,
1.162 mike 777: or the <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code> of the element, if there isn't.<p>The <dfn id="attr-option-selected" title="attr-option-selected"><code>selected</code></dfn>
778: attribute represents the default <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-option-selectedness" title='Read about this "selectedness" reference in the full HTML5 spec.'>selectedness</a> of the
1.234 mike 779: element.<p>A <code><a href="#the-select-element" id="select-39">select</a></code> element whose <code title="attr-select-multiple"><a href="#attr-select-multiple" id="multiple-34">multiple</a></code> attribute is not
1.191 mike 780: specified must not have more than one descendant <code><a href="#the-option-element" id="option-33">option</a></code>
1.156 mike 781: element with its <code title="attr-option-selected"><a href="#attr-option-selected" id="selected-1">selected</a></code>
1.162 mike 782: attribute set.<dl class="domintro"><dt><var title="">option</var> . <code title="dom-option-selected"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-selected" title='Read about this "selected" reference in the full HTML5 spec.'>selected</a></code></dt>
1.9 mike 783:
784: <dd>
785:
786: <p>Returns true if the element is selected, and false otherwise.</p>
787:
1.202 mike 788: <p>Can be set, to override the current state of the element.</p>
789:
1.9 mike 790: </dd>
791:
1.162 mike 792: <dt><var title="">option</var> . <code title="dom-option-index"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-index" title='Read about this "index" reference in the full HTML5 spec.'>index</a></code></dt>
1.9 mike 793:
794: <dd>
795:
1.234 mike 796: <p>Returns the index of the element in its <code><a href="#the-select-element" id="select-40">select</a></code>
1.162 mike 797: element's <code title="dom-select-options"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-select-options" title='Read about this "options" reference in the full HTML5 spec.'>options</a></code>
1.9 mike 798: list.</p>
799:
800: </dd>
801:
1.162 mike 802: <dt><var title="">option</var> . <code title="dom-option-form"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a></code></dt>
1.9 mike 803:
804: <dd>
805:
1.262 mike 806: <p>Returns the element's <code><a href="forms.html#the-form-element" id="form-22">form</a></code> element, if any, or
1.9 mike 807: null otherwise.</p>
808:
809: </dd>
810:
1.162 mike 811: <dt><var title="">option</var> . <code title="dom-option-text"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option-text" title='Read about this "text" reference in the full HTML5 spec.'>text</a></code></dt>
1.11 mike 812:
813: <dd>
814:
1.206 mike 815: <p>Same as <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code>, except that spaces are collapsed.</p>
1.11 mike 816:
817: </dd>
818:
1.162 mike 819: <dt><var title="">option</var> = new <code title="dom-option"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-option" title='Read about this "Option" reference in the full HTML5 spec.'>Option</a></code>( [ <var title="">text</var> [, <var title="">value</var> [, <var title="">defaultSelected</var> [, <var title="">selected</var> ] ] ] ] )</dt>
1.9 mike 820:
821: <dd>
822:
1.191 mike 823: <p>Returns a new <code><a href="#the-option-element" id="option-34">option</a></code> element.</p>
1.9 mike 824:
825: <p>The <var title="">text</var> argument sets the contents of the element.</p>
1.255 mike 826: <p>The <var title="">value</var> argument sets the <code title="attr-option-value"><a href="#attr-option-value" id="value-36">value</a></code> attribute.</p>
1.156 mike 827: <p>The <var title="">defaultSelected</var> argument sets the <code title="attr-option-selected"><a href="#attr-option-selected" id="selected-2">selected</a></code> attribute.</p>
1.9 mike 828: <p>The <var title="">selected</var> argument sets whether or not the element is selected. If it is omitted, even if the <var title="">defaultSelected</var> argument is true, the element is not selected.</p>
829:
830: </dd>
831:
1.202 mike 832: </dl><h4 id="the-textarea-element"><span class="secno">4.10.13 </span>The <dfn><code>textarea</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.258 mike 833: <dd><a href="content-models.html#flow-content" id="flow-content-126">Flow content</a>.</dd>
834: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-138">Phrasing content</a>.</dd>
1.156 mike 835: <dd><a href="content-models.html#interactive-content" id="interactive-content-17">Interactive content</a>.</dd>
1.202 mike 836: <dd><a href="forms.html#category-listed" id="category-listed-7" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-5" title="category-label">labelable</a>, <a href="forms.html#category-submit" id="category-submit-6" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" id="category-reset-3" title="category-reset">resettable</a> <a href="forms.html#form-associated-element" id="form-associated-element-11">form-associated element</a>.</dd>
1.203 mike 837: <dt>Contexts in which this element can be used:</dt>
1.258 mike 838: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-139">phrasing content</a> is expected.</dd>
1.9 mike 839: <dt>Content model:</dt>
1.156 mike 840: <dd><a href="content-models.html#text-content" id="text-content-5" title="text content">Text</a>.</dd>
1.9 mike 841: <dt>Content attributes:</dt>
1.258 mike 842: <dd><a href="elements.html#global-attributes" id="global-attributes-91">Global attributes</a></dd>
1.156 mike 843: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-5">autofocus</a></code></dd>
844: <dd><code title="attr-textarea-cols"><a href="#attr-textarea-cols" id="cols">cols</a></code></dd>
845: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-16">disabled</a></code></dd>
1.262 mike 846: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-53">form</a></code></dd>
1.156 mike 847: <dd><code title="attr-textarea-maxlength"><a href="#attr-textarea-maxlength" id="maxlength-27">maxlength</a></code></dd>
848: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-41">name</a></code></dd>
849: <dd><code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder" id="placeholder-28">placeholder</a></code></dd>
1.187 mike 850: <dd><code title="attr-textarea-readonly"><a href="#attr-textarea-readonly" id="readonly-41">readonly</a></code></dd>
1.234 mike 851: <dd><code title="attr-textarea-required"><a href="#attr-textarea-required" id="required-32">required</a></code></dd>
1.156 mike 852: <dd><code title="attr-textarea-rows"><a href="#attr-textarea-rows" id="rows">rows</a></code></dd>
853: <dd><code title="attr-textarea-wrap"><a href="#attr-textarea-wrap" id="wrap">wrap</a></code></dd>
1.9 mike 854: <dt>DOM interface:</dt>
855: <dd>
1.258 mike 856: <pre class="idl">interface <dfn id="htmltextareaelement">HTMLTextAreaElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-102">HTMLElement</a> {
1.162 mike 857: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-autofocus" title='Read about this "autofocus" reference in the full HTML5 spec.'>autofocus</a>;
858: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-cols" title='Read about this "cols" reference in the full HTML5 spec.'>cols</a>;
859: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
860: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-8">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
861: attribute long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-maxlength" title='Read about this "maxLength" reference in the full HTML5 spec.'>maxLength</a>;
862: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
863: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-placeholder" title='Read about this "placeholder" reference in the full HTML5 spec.'>placeholder</a>;
864: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-readonly" title='Read about this "readOnly" reference in the full HTML5 spec.'>readOnly</a>;
865: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-required" title='Read about this "required" reference in the full HTML5 spec.'>required</a>;
866: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-rows" title='Read about this "rows" reference in the full HTML5 spec.'>rows</a>;
867: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-wrap" title='Read about this "wrap" reference in the full HTML5 spec.'>wrap</a>;
868:
869: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
870: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-defaultvalue" title='Read about this "defaultValue" reference in the full HTML5 spec.'>defaultValue</a>;
871: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
872: readonly attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-textarea-textlength" title='Read about this "textLength" reference in the full HTML5 spec.'>textLength</a>;
873:
874: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
875: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
876: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
877: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
878: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
879:
880: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
881:
882: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/editing.html#dom-textarea-input-select" title='Read about this "select" reference in the full HTML5 spec.'>select</a>();
883: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/editing.html#dom-textarea-input-selectionstart" title='Read about this "selectionStart" reference in the full HTML5 spec.'>selectionStart</a>;
884: attribute unsigned long <a class="full-spec-link" href="http://dev.w3.org/html5/spec/editing.html#dom-textarea-input-selectionend" title='Read about this "selectionEnd" reference in the full HTML5 spec.'>selectionEnd</a>;
885: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/editing.html#dom-textarea-input-setselectionrange" title='Read about this "setSelectionRange" reference in the full HTML5 spec.'>setSelectionRange</a>(in unsigned long start, in unsigned long end);
1.9 mike 886: };</pre>
887: </dd>
1.234 mike 888: </dl><p>The <code><a href="#the-textarea-element" id="textarea-22">textarea</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a
1.9 mike 889: multiline plain text edit control. The contents of the control represent the
1.160 mike 890: control's default value.<p>The <dfn id="attr-textarea-readonly" title="attr-textarea-readonly"><code>readonly</code></dfn> attribute
1.156 mike 891: is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-17">boolean attribute</a> used to control whether the text
1.160 mike 892: can be edited by the user or not.<p>The <dfn id="attr-textarea-cols" title="attr-textarea-cols"><code>cols</code></dfn>
1.9 mike 893: attribute specifies the expected maximum number of characters per
1.156 mike 894: line. If the <code title="attr-textarea-cols"><a href="#attr-textarea-cols" id="cols-0">cols</a></code> attribute
895: is specified, its value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer" id="valid-non-negative-integer-11">valid non-negative
1.160 mike 896: integer</a> greater than zero. <p>The <dfn id="attr-textarea-rows" title="attr-textarea-rows"><code>rows</code></dfn>
1.156 mike 897: attribute specifies the number of lines to show. If the <code title="attr-textarea-rows"><a href="#attr-textarea-rows" id="rows-0">rows</a></code> attribute is specified, its
898: value must be a <a href="common-microsyntaxes.html#valid-non-negative-integer" id="valid-non-negative-integer-12">valid non-negative integer</a> greater than
1.160 mike 899: zero. <p>The <dfn id="attr-textarea-wrap" title="attr-textarea-wrap"><code>wrap</code></dfn>
1.156 mike 900: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute" id="enumerated-attribute-9">enumerated attribute</a> with two keywords
1.9 mike 901: and states: the <dfn id="attr-textarea-wrap-soft" title="attr-textarea-wrap-soft"><code>soft</code></dfn> keyword
1.198 mike 902: which maps to the <a href="#attr-textarea-wrap-soft-state" id="attr-textarea-wrap-soft-state-0" title="attr-textarea-wrap-soft-state">Soft</a> state, and the
1.9 mike 903: <dfn id="attr-textarea-wrap-hard" title="attr-textarea-wrap-hard"><code>hard</code></dfn> keyword
1.198 mike 904: which maps to the <a href="#attr-textarea-wrap-hard-state" id="attr-textarea-wrap-hard-state-0" title="attr-textarea-wrap-hard-state">Hard</a> state. The
905: <i>missing value default</i> is the <a href="#attr-textarea-wrap-soft-state" id="attr-textarea-wrap-soft-state-1" title="attr-textarea-wrap-soft-state">Soft</a> state.<p>The <dfn id="attr-textarea-wrap-soft-state" title="attr-textarea-wrap-soft-state">Soft</dfn> state
1.234 mike 906: indicates that the text in the <code><a href="#the-textarea-element" id="textarea-23">textarea</a></code> is not to be
1.198 mike 907: wrapped when it is submitted (though it can still be wrapped in the
908: rendering).<p>The <dfn id="attr-textarea-wrap-hard-state" title="attr-textarea-wrap-hard-state">Hard</dfn> state
1.234 mike 909: indicates that the text in the <code><a href="#the-textarea-element" id="textarea-24">textarea</a></code> is to have
1.198 mike 910: newlines added by the user agent so that the text is wrapped when it
911: is submitted.<p>If the element's <code title="attr-textarea-wrap"><a href="#attr-textarea-wrap" id="wrap-0">wrap</a></code>
912: attribute is in the <a href="#attr-textarea-wrap-hard-state" id="attr-textarea-wrap-hard-state-1" title="attr-textarea-wrap-hard-state">Hard</a> state, the <code title="attr-textarea-cols"><a href="#attr-textarea-cols" id="cols-1">cols</a></code> attribute must be
1.9 mike 913: specified.</p><!-- attr-textarea-wrap-off (attr-textarea-wrap-off-state): not
914: conforming; turns off the rendering of wrapping but otherwise acts
915: like 'soft' --><p>The <dfn id="attr-textarea-maxlength" title="attr-textarea-maxlength"><code>maxlength</code></dfn>
1.156 mike 916: attribute is a <a href="association-of-controls-and-forms.html#attr-fe-maxlength" id="attr-fe-maxlength-1" title="attr-fe-maxlength">form control <code title="">maxlength</code> attribute</a> controlled by the
1.234 mike 917: <code><a href="#the-textarea-element" id="textarea-25">textarea</a></code> element's <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#concept-textarea-dirty" title='Read about this "dirty value flag" reference in the full HTML5 spec.'>dirty value flag</a>.<p>If the <code><a href="#the-textarea-element" id="textarea-26">textarea</a></code> element has a <a href="association-of-controls-and-forms.html#maximum-allowed-value-length" id="maximum-allowed-value-length-2">maximum allowed
1.9 mike 918: value length</a>, then the element's children must be such that
1.162 mike 919: the <a class="full-spec-link" href="http://dev.w3.org/html5/spec/common-microsyntaxes.html#code-point-length" title='Read about this "code-point length" reference in the full HTML5 spec.'>code-point length</a> of the value of the element's
920: <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#textcontent" title='Read about this "textContent" reference in the full HTML5 spec.'>textContent</a></code> IDL attribute is equal to or less than the
1.160 mike 921: element's <a href="association-of-controls-and-forms.html#maximum-allowed-value-length" id="maximum-allowed-value-length-3">maximum allowed value length</a>.<p>The <dfn id="attr-textarea-required" title="attr-textarea-required"><code>required</code></dfn> attribute
1.156 mike 922: is a <a href="common-microsyntaxes.html#boolean-attribute" id="boolean-attribute-18">boolean attribute</a>. When specified, the user will
1.9 mike 923: be required to enter a value before submitting the form.</p><!-- similar text in the <input> section --><p>The <dfn id="attr-textarea-placeholder" title="attr-textarea-placeholder"><code>placeholder</code></dfn>
924: attribute represents a hint (a word or short phrase) intended to aid
925: the user with data entry. A hint could be a sample value or a brief
926: description of the expected format. The attribute, if specified,
927: must have a value that contains no U+000A LINE FEED (LF) or U+000D
1.160 mike 928: CARRIAGE RETURN (CR) characters.<p class="note">For a longer hint or other advisory text, the <code title="attr-title"><a href="elements.html#the-title-attribute" id="title-26">title</a></code> attribute is more appropriate.<p>The <code title="attr-textarea-placeholder"><a href="#attr-textarea-placeholder" id="placeholder-29">placeholder</a></code>
1.9 mike 929: attribute should not be used as an alternative to a
1.262 mike 930: <code><a href="forms.html#the-label-element" id="label-16">label</a></code>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-54">form</a></code> attribute is used to
1.234 mike 931: explicitly associate the <code><a href="#the-textarea-element" id="textarea-27">textarea</a></code> element with its
1.156 mike 932: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-10">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-42">name</a></code>
933: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-17">disabled</a></code> attribute is used to make
1.9 mike 934: the control non-interactive and to prevent its value from being
1.156 mike 935: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-6">autofocus</a></code>
1.160 mike 936: attribute controls focus.<dl class="domintro"><dt><var title="">textarea</var> . <code title="attr-textarea-type">type</code></dt>
1.9 mike 937:
938: <dd>
939:
940: <p>Returns the string "<code title="">textarea</code>".</p>
941:
942: </dd>
943:
944: <dt><var title="">textarea</var> . <code title="attr-textarea-value">value</code></dt>
945:
946: <dd>
947:
948: <p>Returns the current value of the element.</p>
949:
950: <p>Can be set, to change the value.</p>
951:
952: </dd>
953:
954: </dl><div class="example">
955:
1.234 mike 956: <p>Here is an example of a <code><a href="#the-textarea-element" id="textarea-28">textarea</a></code> being used for
1.9 mike 957: unrestricted free-form text input in a form:</p>
958:
959: <pre><p>If you have any comments, please let us know: <textarea cols=80 name=comments></textarea></p></pre>
960:
1.202 mike 961: </div><h4 id="the-keygen-element"><span class="secno">4.10.14 </span>The <dfn><code>keygen</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.258 mike 962: <dd><a href="content-models.html#flow-content" id="flow-content-127">Flow content</a>.</dd>
963: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-140">Phrasing content</a>.</dd>
1.156 mike 964: <dd><a href="content-models.html#interactive-content" id="interactive-content-18">Interactive content</a>.</dd>
1.202 mike 965: <dd><a href="forms.html#category-listed" id="category-listed-8" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-6" title="category-label">labelable</a>, <a href="forms.html#category-submit" id="category-submit-7" title="category-submit">submittable</a>, and <a href="forms.html#category-reset" id="category-reset-4" title="category-reset">resettable</a> <a href="forms.html#form-associated-element" id="form-associated-element-12">form-associated element</a>.</dd>
1.203 mike 966: <dt>Contexts in which this element can be used:</dt>
1.258 mike 967: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-141">phrasing content</a> is expected.</dd>
1.9 mike 968: <dt>Content model:</dt>
969: <dd>Empty.</dd>
970: <dt>Content attributes:</dt>
1.258 mike 971: <dd><a href="elements.html#global-attributes" id="global-attributes-92">Global attributes</a></dd>
1.156 mike 972: <dd><code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-7">autofocus</a></code></dd>
973: <dd><code title="attr-keygen-challenge"><a href="#attr-keygen-challenge" id="challenge">challenge</a></code></dd>
974: <dd><code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-18">disabled</a></code></dd>
1.262 mike 975: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-55">form</a></code></dd>
1.156 mike 976: <dd><code title="attr-keygen-keytype"><a href="#attr-keygen-keytype" id="keytype">keytype</a></code></dd>
977: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-43">name</a></code></dd>
1.9 mike 978: <dt>DOM interface:</dt>
979: <dd>
1.258 mike 980: <pre class="idl">interface <dfn id="htmlkeygenelement">HTMLKeygenElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-103">HTMLElement</a> {
1.162 mike 981: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-autofocus" title='Read about this "autofocus" reference in the full HTML5 spec.'>autofocus</a>;
982: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-keygen-challenge" title='Read about this "challenge" reference in the full HTML5 spec.'>challenge</a>;
983: attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-disabled" title='Read about this "disabled" reference in the full HTML5 spec.'>disabled</a>;
984: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-9">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
985: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-keygen-keytype" title='Read about this "keytype" reference in the full HTML5 spec.'>keytype</a>;
986: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
987:
988: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-keygen-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
989:
990: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
991: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
992: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
993: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
994: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
1.9 mike 995:
1.162 mike 996: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.9 mike 997: };</pre>
998: </dd>
1.190 mike 999: </dl><p>The <code><a href="#the-keygen-element" id="keygen-12">keygen</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a key
1.9 mike 1000: pair generator control. When the control's form is submitted, the
1001: private key is stored in the local keystore, and the public key is
1.160 mike 1002: packaged and sent to the server.<p>The <dfn id="attr-keygen-challenge" title="attr-keygen-challenge"><code>challenge</code></dfn> attribute
1.9 mike 1003: may be specified. Its value will be packaged with the submitted
1.160 mike 1004: key.<p>The <dfn id="attr-keygen-keytype" title="attr-keygen-keytype"><code>keytype</code></dfn>
1.156 mike 1005: attribute is an <a href="common-microsyntaxes.html#enumerated-attribute" id="enumerated-attribute-10">enumerated attribute</a>. The following
1.160 mike 1006: table lists the keywords and states for the attribute — the
1.9 mike 1007: keywords in the left column map to the states listed in the cell in
1008: the second column on the same row as the keyword. User agents are
1.26 mike 1009: not required to support these values, and must only recognize values
1.160 mike 1010: whose corresponding algorithms they support.<table><thead><tr><th> Keyword <th> State
1011: <tbody><tr><td> <code title="">rsa</code>
1012: <td> <i title="">RSA</i>
1.9 mike 1013: <!-- v2 (see below)
1014: <tr>
1015: <td> <code title="">ec</code>
1016: <td> <i title="">EC</i>
1017: -->
1.160 mike 1018: </table><p>The <i>invalid value default</i> state is the <i title="">unknown</i> state. The <i>missing value default</i> state
1019: is the <i title="">RSA</i> state, if it is supported, or the <i title="">unknown</i> state otherwise.<p class="note">This specification does not specify what key types
1020: user agents are to support — it is possible for a user agent
1.262 mike 1021: to not support any key types at all.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-56">form</a></code> attribute is used to
1.190 mike 1022: explicitly associate the <code><a href="#the-keygen-element" id="keygen-13">keygen</a></code> element with its
1.156 mike 1023: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-11">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-44">name</a></code>
1024: attribute represents the element's name. The <code title="attr-fe-disabled"><a href="association-of-controls-and-forms.html#attr-fe-disabled" id="disabled-19">disabled</a></code> attribute is used to make
1.9 mike 1025: the control non-interactive and to prevent its value from being
1.156 mike 1026: submitted. The <code title="attr-fe-autofocus"><a href="association-of-controls-and-forms.html#attr-fe-autofocus" id="autofocus-8">autofocus</a></code>
1.160 mike 1027: attribute controls focus.<dl class="domintro"><dt><var title="">keygen</var> . <code title="attr-keygen-type">type</code></dt>
1.9 mike 1028:
1029: <dd>
1030:
1031: <p>Returns the string "<code title="">keygen</code>".</p>
1032:
1033: </dd>
1034:
1035: </dl><p class="note">This specification does not specify how the private
1036: key generated is to be used. It is expected that after receiving the
1.162 mike 1037: <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#signedpublickeyandchallenge" title='Read about this "SignedPublicKeyAndChallenge" reference in the full HTML5 spec.'>SignedPublicKeyAndChallenge</a></code> (SPKAC) structure, the
1.9 mike 1038: server will generate a client certificate and offer it back to the
1039: user for download; this certificate, once downloaded and stored in
1040: the key store along with the private key, can then be used to
1.88 mike 1041: authenticate to services that use TLS and certificate
1.9 mike 1042: authentication.</p><!-- how does the UA know which private key is associated with a
1043: certificate it gets back after the server has taken the public key
1044: created by <keygen> and turned it into a client cert? --><div class="example">
1045:
1046: <p>To generate a key pair, add the private key to the user's key
1047: store, and submit the public key to the server, markup such as the
1048: following can be used:</p>
1049:
1.22 mike 1050: <pre><form action="processkey.cgi" method="post" enctype="multipart/form-data">
1.9 mike 1051: <p><keygen name="key"></p>
1052: <p><input type=submit value="Submit key..."></p>
1053: </form></pre>
1054:
1055: <p>The server will then receive a form submission with a packaged
1056: RSA public key as the value of "<code title="">key</code>". This
1057: can then be used for various purposes, such as generating a client
1058: certificate, as mentioned above.</p>
1059:
1.202 mike 1060: </div><h4 id="the-output-element"><span class="secno">4.10.15 </span>The <dfn><code>output</code></dfn> element</h4><dl class="element"><dt>Categories</dt>
1.258 mike 1061: <dd><a href="content-models.html#flow-content" id="flow-content-128">Flow content</a>.</dd>
1062: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-142">Phrasing content</a>.</dd>
1.202 mike 1063: <dd><a href="forms.html#category-listed" id="category-listed-9" title="category-listed">Listed</a>, <a href="forms.html#category-label" id="category-label-7" title="category-label">labelable</a>, and <a href="forms.html#category-reset" id="category-reset-5" title="category-reset">resettable</a> <a href="forms.html#form-associated-element" id="form-associated-element-13">form-associated element</a>.</dd>
1.203 mike 1064: <dt>Contexts in which this element can be used:</dt>
1.258 mike 1065: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-143">phrasing content</a> is expected.</dd>
1.9 mike 1066: <dt>Content model:</dt>
1.258 mike 1067: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-144">Phrasing content</a>.</dd>
1.9 mike 1068: <dt>Content attributes:</dt>
1.258 mike 1069: <dd><a href="elements.html#global-attributes" id="global-attributes-93">Global attributes</a></dd>
1.156 mike 1070: <dd><code title="attr-output-for"><a href="#attr-output-for" id="for-2">for</a></code></dd>
1.262 mike 1071: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-57">form</a></code></dd>
1.156 mike 1072: <dd><code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-45">name</a></code></dd>
1.9 mike 1073: <dt>DOM interface:</dt>
1074: <dd>
1.258 mike 1075: <pre class="idl">interface <dfn id="htmloutputelement">HTMLOutputElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-104">HTMLElement</a> {
1.167 mike 1076: [PutForwards=<a class="full-spec-link" href="http://dev.w3.org/html5/spec/common-dom-interfaces.html#dom-domsettabletokenlist-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>] readonly attribute <a href="urls.html#domsettabletokenlist" id="domsettabletokenlist-5">DOMSettableTokenList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-htmlfor" title='Read about this "htmlFor" reference in the full HTML5 spec.'>htmlFor</a>;
1.162 mike 1077: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-10">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1078: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fe-name" title='Read about this "name" reference in the full HTML5 spec.'>name</a>;
1079:
1080: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a>;
1081: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-defaultvalue" title='Read about this "defaultValue" reference in the full HTML5 spec.'>defaultValue</a>;
1082: attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1083:
1084: readonly attribute boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-willvalidate" title='Read about this "willValidate" reference in the full HTML5 spec.'>willValidate</a>;
1085: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#validitystate" title='Read about this "ValidityState" reference in the full HTML5 spec.'>ValidityState</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validity" title='Read about this "validity" reference in the full HTML5 spec.'>validity</a>;
1086: readonly attribute DOMString <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-validationmessage" title='Read about this "validationMessage" reference in the full HTML5 spec.'>validationMessage</a>;
1087: boolean <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-checkvalidatity" title='Read about this "checkValidity" reference in the full HTML5 spec.'>checkValidity</a>();
1088: void <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-cva-setcustomvalidity" title='Read about this "setCustomValidity" reference in the full HTML5 spec.'>setCustomValidity</a>(in DOMString error);
1.11 mike 1089:
1.162 mike 1090: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.9 mike 1091: };</pre>
1092: </dd>
1.162 mike 1093: </dl><p>The <code><a href="#the-output-element" id="output-11">output</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> the result of a
1.160 mike 1094: calculation.<p>The <dfn id="attr-output-for" title="attr-output-for"><code>for</code></dfn> content
1.9 mike 1095: attribute allows an explicit relationship to be made between the
1096: result of a calculation and the elements that represent the values
1097: that went into the calculation or that otherwise influenced the
1.156 mike 1098: calculation. The <code title="attr-output-for"><a href="#attr-output-for" id="for-3">for</a></code> attribute,
1099: if specified, must contain a string consisting of an <a href="common-microsyntaxes.html#unordered-set-of-unique-space-separated-tokens" id="unordered-set-of-unique-space-separated-tokens-2">unordered
1.265 mike 1100: set of unique space-separated tokens</a> that are
1101: <a href="infrastructure.html#case-sensitive" id="case-sensitive-5">case-sensitive</a>, each of which must have the value of an
1102: <a href="elements.html#concept-id" id="concept-id-19" title="concept-id">ID</a> of an element in the same
1.262 mike 1103: <code><a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#document" title='Read about this "Document" reference in the full HTML5 spec.'>Document</a></code>.<p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-58">form</a></code> attribute is used to
1.156 mike 1104: explicitly associate the <code><a href="#the-output-element" id="output-12">output</a></code> element with its
1105: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-12">form owner</a>. The <code title="attr-fe-name"><a href="association-of-controls-and-forms.html#attr-fe-name" id="name-46">name</a></code>
1.162 mike 1106: attribute represents the element's name.<dl class="domintro"><dt><var title="">output</var> . <code title="dom-output-value"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 1107:
1108: <dd>
1109:
1110: <p>Returns the element's current value.</p>
1111:
1112: <p>Can be set, to change the value.</p>
1113:
1114: </dd>
1115:
1.162 mike 1116: <dt><var title="">output</var> . <code title="dom-output-defaultValue"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-defaultvalue" title='Read about this "defaultValue" reference in the full HTML5 spec.'>defaultValue</a></code> [ = <var title="">value</var> ]</dt>
1.9 mike 1117:
1118: <dd>
1119:
1120: <p>Returns the element's current default value.</p>
1121:
1122: <p>Can be set, to change the default value.</p>
1123:
1124: </dd>
1125:
1.162 mike 1126: <dt><var title="">output</var> . <code title="dom-output-type"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-output-type" title='Read about this "type" reference in the full HTML5 spec.'>type</a></code></dt>
1.9 mike 1127:
1128: <dd>
1129:
1130: <p>Returns the string "<code title="">output</code>".</p>
1131:
1132: </dd>
1133:
1134: </dl><div class="example">
1135:
1.156 mike 1136: <p>A simple calculator could use <code><a href="#the-output-element" id="output-13">output</a></code> for its
1.9 mike 1137: display of calculated results:</p>
1138:
1139: <pre><form onsubmit="return false">
1140: <input name=a type=number step=any> +
1141: <input name=b type=number step=any> =
1.32 mike 1142: <output onforminput="value = a.valueAsNumber + b.valueAsNumber"></output>
1.9 mike 1143: </form></pre>
1144:
1.202 mike 1145: </div><h4 id="the-progress-element"><span class="secno">4.10.16 </span>The <dfn><code>progress</code></dfn> element</h4><p class="XXX annotation"><span><a href="http://www.w3.org/html/wg/tracker/issues/96">ISSUE-96</a> (progress) blocks progress to Last Call</span><dl class="element"><dt>Categories</dt>
1.258 mike 1146: <dd><a href="content-models.html#flow-content" id="flow-content-129">Flow content</a>.</dd>
1147: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-145">Phrasing content</a>.</dd>
1.202 mike 1148: <dd><a href="forms.html#category-label" id="category-label-8" title="category-label">Labelable</a> <a href="forms.html#form-associated-element" id="form-associated-element-14">form-associated element</a>.</dd>
1.203 mike 1149: <dt>Contexts in which this element can be used:</dt>
1.258 mike 1150: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-146">phrasing content</a> is expected.</dd>
1.11 mike 1151: <dt>Content model:</dt>
1.258 mike 1152: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-147">Phrasing content</a>, but there must be no <code><a href="#the-progress-element" id="progress-8">progress</a></code> element descendants.</dd>
1.11 mike 1153: <dt>Content attributes:</dt>
1.258 mike 1154: <dd><a href="elements.html#global-attributes" id="global-attributes-94">Global attributes</a></dd>
1.255 mike 1155: <dd><code title="attr-progress-value"><a href="#attr-progress-value" id="value-38">value</a></code></dd>
1.156 mike 1156: <dd><code title="attr-progress-max"><a href="#attr-progress-max" id="max-36">max</a></code></dd>
1.262 mike 1157: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-59">form</a></code></dd>
1.11 mike 1158: <dt>DOM interface:</dt>
1159: <dd>
1.258 mike 1160: <pre class="idl">interface <dfn id="htmlprogresselement">HTMLProgressElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-105">HTMLElement</a> {
1.197 mike 1161: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1162: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-max" title='Read about this "max" reference in the full HTML5 spec.'>max</a>;
1163: readonly attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-position" title='Read about this "position" reference in the full HTML5 spec.'>position</a>;
1.162 mike 1164: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-11">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1165: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.11 mike 1166: };</pre>
1167: </dd>
1.162 mike 1168: </dl><p>The <code><a href="#the-progress-element" id="progress-9">progress</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> the
1.11 mike 1169: completion progress of a task. The progress is either indeterminate,
1170: indicating that progress is being made but that it is not clear how
1171: much more work remains to be done before the task is complete
1172: (e.g. because the task is waiting for a remote host to respond), or
1173: the progress is a number in the range zero to a maximum, giving the
1.160 mike 1174: fraction of work that has so far been completed.<p>There are two attributes that determine the current task
1175: completion represented by the element.<p>The <dfn id="attr-progress-value" title="attr-progress-value"><code>value</code></dfn>
1.11 mike 1176: attribute specifies how much of the task has been completed, and the
1177: <dfn id="attr-progress-max" title="attr-progress-max"><code>max</code></dfn> attribute
1178: specifies how much work the task requires in total. The units are
1.160 mike 1179: arbitrary and not specified.<p>Authors are encouraged to also include the current value and the
1.11 mike 1180: maximum value inline as text inside the element, so that the
1.160 mike 1181: progress is made available to users of legacy user agents.<div class="example">
1.11 mike 1182: <p>Here is a snippet of a Web application that shows the progress
1183: of some automated task:</p>
1184: <pre><section>
1185: <h2>Task Progress</h2>
1186: <p>Progress: <progress id="p" max=100><span>0</span>%</progress></p>
1187: <script>
1188: var progressBar = document.getElementById('p');
1189: function updateProgress(newValue) {
1190: progressBar.value = newValue;
1191: progressBar.getElementsByTagName('span')[0].textContent = newValue;
1192: }
1193: </script>
1194: </section></pre>
1195: <p>(The <code>updateProgress()</code> method in this example would
1196: be called by some other code on the page to update the actual
1197: progress bar as the task progressed.)</p>
1.255 mike 1198: </div><p>The <code title="attr-progress-value"><a href="#attr-progress-value" id="value-39">value</a></code> and <code title="attr-progress-max"><a href="#attr-progress-max" id="max-37">max</a></code> attributes, when present, must
1.156 mike 1199: have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" id="valid-floating-point-number-9" title="valid floating point number">valid
1.255 mike 1200: floating point numbers</a>. The <code title="attr-progress-value"><a href="#attr-progress-value" id="value-40">value</a></code> attribute, if present, must
1.11 mike 1201: have a value equal to or greater than zero, and less than or equal
1.156 mike 1202: to the value of the <code title="attr-progress-max"><a href="#attr-progress-max" id="max-38">max</a></code>
1203: attribute, if present, or 1.0, otherwise. The <code title="attr-progress-max"><a href="#attr-progress-max" id="max-39">max</a></code> attribute, if present, must
1.160 mike 1204: have a value greater than zero.<p class="note">The <code><a href="#the-progress-element" id="progress-10">progress</a></code> element is the wrong
1.11 mike 1205: element to use for something that is just a gauge, as opposed to
1206: task progress. For instance, indicating disk space usage using
1.156 mike 1207: <code><a href="#the-progress-element" id="progress-11">progress</a></code> would be inappropriate. Instead, the
1.190 mike 1208: <code><a href="#the-meter-element" id="meter-8">meter</a></code> element is available for such use cases.<dl class="domintro"><dt><var title="">progress</var> . <code title="dom-progress-position"><a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-progress-position" title='Read about this "position" reference in the full HTML5 spec.'>position</a></code></dt>
1.11 mike 1209:
1210: <dd>
1211:
1212: <p>For a determinate progress bar (one with known current and
1213: maximum values), returns the result of dividing the current value
1214: by the maximum value.</p>
1215:
1.160 mike 1216: <p>For an indeterminate progress bar, returns −1.</p>
1.11 mike 1217:
1.202 mike 1218: </dl><h4 id="the-meter-element"><span class="secno">4.10.17 </span>The <dfn><code>meter</code></dfn> element</h4><p class="XXX annotation"><span><a href="http://www.w3.org/html/wg/tracker/issues/97">ISSUE-97</a> (meter) blocks progress to Last Call</span></p><!-- Keep this after <progress> and NOT close to <time> --><dl class="element"><dt>Categories</dt>
1.258 mike 1219: <dd><a href="content-models.html#flow-content" id="flow-content-130">Flow content</a>.</dd>
1220: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-148">Phrasing content</a>.</dd>
1.202 mike 1221: <dd><a href="forms.html#category-label" id="category-label-9" title="category-label">Labelable</a> <a href="forms.html#form-associated-element" id="form-associated-element-15">form-associated element</a>.</dd>
1.203 mike 1222: <dt>Contexts in which this element can be used:</dt>
1.258 mike 1223: <dd>Where <a href="content-models.html#phrasing-content" id="phrasing-content-149">phrasing content</a> is expected.</dd>
1.11 mike 1224: <dt>Content model:</dt>
1.258 mike 1225: <dd><a href="content-models.html#phrasing-content" id="phrasing-content-150">Phrasing content</a>, but there must be no <code><a href="#the-meter-element" id="meter-9">meter</a></code> element descendants.</dd>
1.11 mike 1226: <dt>Content attributes:</dt>
1.258 mike 1227: <dd><a href="elements.html#global-attributes" id="global-attributes-95">Global attributes</a></dd>
1.255 mike 1228: <dd><code title="attr-meter-value"><a href="#attr-meter-value" id="value-42">value</a></code></dd>
1.156 mike 1229: <dd><code title="attr-meter-min"><a href="#attr-meter-min" id="min-38">min</a></code></dd>
1230: <dd><code title="attr-meter-max"><a href="#attr-meter-max" id="max-41">max</a></code></dd>
1231: <dd><code title="attr-meter-low"><a href="#attr-meter-low" id="low">low</a></code></dd>
1232: <dd><code title="attr-meter-high"><a href="#attr-meter-high" id="high">high</a></code></dd>
1233: <dd><code title="attr-meter-optimum"><a href="#attr-meter-optimum" id="optimum">optimum</a></code></dd>
1.262 mike 1234: <dd><code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-60">form</a></code></dd>
1.11 mike 1235: <dt>DOM interface:</dt>
1236: <dd>
1.258 mike 1237: <pre class="idl">interface <dfn id="htmlmeterelement">HTMLMeterElement</dfn> : <a href="elements.html#htmlelement" id="htmlelement-106">HTMLElement</a> {
1.197 mike 1238: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-value" title='Read about this "value" reference in the full HTML5 spec.'>value</a>;
1239: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-min" title='Read about this "min" reference in the full HTML5 spec.'>min</a>;
1240: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-max" title='Read about this "max" reference in the full HTML5 spec.'>max</a>;
1241: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-low" title='Read about this "low" reference in the full HTML5 spec.'>low</a>;
1242: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-high" title='Read about this "high" reference in the full HTML5 spec.'>high</a>;
1243: attribute double <a class="full-spec-link" href="http://dev.w3.org/html5/spec/the-button-element.html#dom-meter-optimum" title='Read about this "optimum" reference in the full HTML5 spec.'>optimum</a>;
1.162 mike 1244: readonly attribute <a href="forms.html#htmlformelement" id="htmlformelement-12">HTMLFormElement</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/association-of-controls-and-forms.html#dom-fae-form" title='Read about this "form" reference in the full HTML5 spec.'>form</a>;
1245: readonly attribute <a class="full-spec-link" href="http://dev.w3.org/html5/spec/infrastructure.html#nodelist" title='Read about this "NodeList" reference in the full HTML5 spec.'>NodeList</a> <a class="full-spec-link" href="http://dev.w3.org/html5/spec/forms.html#dom-lfe-labels" title='Read about this "labels" reference in the full HTML5 spec.'>labels</a>;
1.11 mike 1246: };</pre>
1247: </dd>
1.190 mike 1248: </dl><p>The <code><a href="#the-meter-element" id="meter-10">meter</a></code> element <a class="full-spec-link" href="http://dev.w3.org/html5/spec/rendering.html#represents" title='Read about this "represents" reference in the full HTML5 spec.'>represents</a> a scalar
1.11 mike 1249: measurement within a known range, or a fractional value; for example
1250: disk usage, the relevance of a query result, or the fraction of a
1.190 mike 1251: voting population to have selected a particular candidate.<p>This is also known as a gauge.<p class="note">The <code><a href="#the-meter-element" id="meter-11">meter</a></code> element should not be used to
1.11 mike 1252: indicate progress (as in a progress bar). For that role, HTML
1.190 mike 1253: provides a separate <code><a href="#the-progress-element" id="progress-12">progress</a></code> element.<p class="note">The <code><a href="#the-meter-element" id="meter-12">meter</a></code> element also does not
1.160 mike 1254: represent a scalar value of arbitrary range — for example, it
1.11 mike 1255: would be wrong to use this to report a weight, or height, unless
1.160 mike 1256: there is a known maximum value.<p>There are six attributes that determine the semantics of the
1257: gauge represented by the element.<p>The <dfn id="attr-meter-min" title="attr-meter-min"><code>min</code></dfn> attribute
1.11 mike 1258: specifies the lower bound of the range, and the <dfn id="attr-meter-max" title="attr-meter-max"><code>max</code></dfn> attribute specifies
1259: the upper bound. The <dfn id="attr-meter-value" title="attr-meter-value"><code>value</code></dfn> attribute
1260: specifies the value to have the gauge indicate as the "measured"
1.160 mike 1261: value.<p>The other three attributes can be used to segment the gauge's
1.11 mike 1262: range into "low", "medium", and "high" parts, and to indicate which
1263: part of the gauge is the "optimum" part. The <dfn id="attr-meter-low" title="attr-meter-low"><code>low</code></dfn> attribute specifies
1264: the range that is considered to be the "low" part, and the <dfn id="attr-meter-high" title="attr-meter-high"><code>high</code></dfn> attribute specifies
1265: the range that is considered to be the "high" part. The <dfn id="attr-meter-optimum" title="attr-meter-optimum"><code>optimum</code></dfn> attribute
1266: gives the position that is "optimum"; if that is higher than the
1267: "high" value then this indicates that the higher the value, the
1268: better; if it's lower than the "low" mark then it indicates that
1269: lower values are better, and naturally if it is in between then it
1.255 mike 1270: indicates that neither high nor low values are good.<p> The <code title="attr-meter-value"><a href="#attr-meter-value" id="value-43">value</a></code> attribute must be
1271: specified. The <code title="attr-meter-value"><a href="#attr-meter-value" id="value-44">value</a></code>, <code title="attr-meter-min"><a href="#attr-meter-min" id="min-39">min</a></code>, <code title="attr-meter-low"><a href="#attr-meter-low" id="low-0">low</a></code>, <code title="attr-meter-high"><a href="#attr-meter-high" id="high-0">high</a></code>, <code title="attr-meter-max"><a href="#attr-meter-max" id="max-42">max</a></code>, and <code title="attr-meter-optimum"><a href="#attr-meter-optimum" id="optimum-0">optimum</a></code> attributes, when present,
1.156 mike 1272: must have values that are <a href="common-microsyntaxes.html#valid-floating-point-number" id="valid-floating-point-number-10" title="valid floating point
1.255 mike 1273: number">valid floating point numbers</a>.<p>In addition, the attributes' values are further constrained:<p>Let <var title="">value</var> be the <code title="attr-meter-value"><a href="#attr-meter-value" id="value-45">value</a></code> attribute's number.<p>If the <code title="attr-meter-min"><a href="#attr-meter-min" id="min-40">min</a></code> attribute
1.11 mike 1274: attribute is specified, then let <var title="">minimum</var> be that
1.160 mike 1275: attribute's value; otherwise, let it be zero.<p>If the <code title="attr-meter-max"><a href="#attr-meter-max" id="max-43">max</a></code> attribute
1.11 mike 1276: attribute is specified, then let <var title="">maximum</var> be that
1.160 mike 1277: attribute's value; otherwise, let it be 1.0.<p>The following inequalities must hold, as applicable:<ul class="brief"><li><var title="">minimum</var> ≤ <var title="">value</var> ≤ <var title="">maximum</var></li>
1278: <li><var title="">minimum</var> ≤ <code title="attr-meter-low"><a href="#attr-meter-low" id="low-1">low</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-low"><a href="#attr-meter-low" id="low-2">low</a></code> is specified)</li>
1279: <li><var title="">minimum</var> ≤ <code title="attr-meter-high"><a href="#attr-meter-high" id="high-1">high</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-high"><a href="#attr-meter-high" id="high-2">high</a></code> is specified)</li>
1280: <li><var title="">minimum</var> ≤ <code title="attr-meter-optimum"><a href="#attr-meter-optimum" id="optimum-1">optimum</a></code> ≤ <var title="">maximum</var> (if <code title="attr-meter-optimum"><a href="#attr-meter-optimum" id="optimum-2">optimum</a></code> is specified)</li>
1281: <li><code title="attr-meter-low"><a href="#attr-meter-low" id="low-3">low</a></code> ≤ <code title="attr-meter-high"><a href="#attr-meter-high" id="high-3">high</a></code> (if both <code title="attr-meter-low"><a href="#attr-meter-low" id="low-4">low</a></code> and <code title="attr-meter-high"><a href="#attr-meter-high" id="high-4">high</a></code> are specified)</li>
1.21 mike 1282: </ul><p class="note">If no minimum or maximum is specified, then the
1.11 mike 1283: range is assumed to be 0..1, and the value thus has to be within
1.160 mike 1284: that range.<p>Authors are encouraged to include a textual representation of the
1.11 mike 1285: gauge's state in the element's contents, for users of user agents
1.190 mike 1286: that do not support the <code><a href="#the-meter-element" id="meter-13">meter</a></code> element.<div class="example">
1.11 mike 1287:
1288: <p>The following examples show three gauges that would all be
1289: three-quarters full:</p>
1290:
1291: <pre>Storage space usage: <meter value=6 max=8>6 blocks used (out of 8 total)</meter>
1292: Voter turnout: <meter value=0.75><img alt="75%" src="graph75.png"></meter>
1293: Tickets sold: <meter min="0" max="100" value="75"></meter></pre>
1294:
1295: <p>The following example is incorrect use of the element, because
1296: it doesn't give a range (and since the default maximum is 1, both
1297: of the gauges would end up looking maxed out):</p>
1298:
1299: <pre class="bad"><p>The grapefruit pie had a radius of <meter value=12>12cm</meter>
1300: and a height of <meter value=2>2cm</meter>.</p> <!-- <strong>BAD!</strong> --></pre>
1301:
1302: <p>Instead, one would either not include the meter element, or use
1303: the meter element with a defined range to give the dimensions in
1304: context compared to other pies:</p>
1305:
1306: <pre><p>The grapefruit pie had a radius of 12cm and a height of
1307: 2cm.</p>
1308: <dl>
1309: <dt>Radius: <dd> <meter min=0 max=20 value=12>12cm</meter>
1310: <dt>Height: <dd> <meter min=0 max=10 value=2>2cm</meter>
1311: </dl></pre>
1312:
1313: </div><p>There is no explicit way to specify units in the
1.190 mike 1314: <code><a href="#the-meter-element" id="meter-14">meter</a></code> element, but the units may be specified in the
1.160 mike 1315: <code title="attr-title"><a href="elements.html#the-title-attribute" id="title-27">title</a></code> attribute in free-form text.<div class="example">
1.11 mike 1316:
1317: <p>The example above could be extended to mention the units:</p>
1318:
1319: <pre><dl>
1320: <dt>Radius: <dd> <meter min=0 max=20 value=12 title="centimeters">12cm</meter>
1321: <dt>Height: <dd> <meter min=0 max=10 value=2 title="centimeters">2cm</meter>
1322: </dl></pre>
1323:
1324: </div><div class="example">
1325: <p>The following markup:</p>
1326: <pre><h3>Suggested groups</h3>
1327: <menu type="toolbar">
1328: <a href="?cmd=hsg" onclick="hideSuggestedGroups()">Hide suggested groups</a>
1329: </menu>
1330: <ul>
1331: <li>
1332: <p><a href="/group/comp.infosystems.www.authoring.stylesheets/view">comp.infosystems.www.authoring.stylesheets</a> -
1333: <a href="/group/comp.infosystems.www.authoring.stylesheets/subscribe">join</a></p>
1334: <p>Group description: <strong>Layout/presentation on the WWW.</strong></p>
1335: <p><strong><meter value="0.5">Moderate activity,</meter></strong> Usenet, 618 subscribers</p>
1336: </li>
1337: <li>
1338: <p><a href="/group/netscape.public.mozilla.xpinstall/view">netscape.public.mozilla.xpinstall</a> -
1339: <a href="/group/netscape.public.mozilla.xpinstall/subscribe">join</a></p>
1340: <p>Group description: <strong>Mozilla XPInstall discussion.</strong></p>
1341: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 22 subscribers</p>
1342: </li>
1343: <li>
1344: <p><a href="/group/mozilla.dev.general/view">mozilla.dev.general</a> -
1345: <a href="/group/mozilla.dev.general/subscribe">join</a></p>
1346: <p><strong><meter value="0.25">Low activity,</meter></strong> Usenet, 66 subscribers</p>
1347: </li>
1348: </ul></pre>
1349: <p>Might be rendered as follows:</p>
1.203 mike 1350: <p><img alt="With the <meter> elements rendered as inline green bars of varying lengths." height="178" src="http://dev.w3.org/html5/spec/images/sample-meter.png" width="332"></p>
1.13 mike 1351: </div><p>User agents combine the value of
1.156 mike 1352: the <code title="attr-title"><a href="elements.html#the-title-attribute" id="title-28">title</a></code> attribute and the other
1.11 mike 1353: attributes to provide context-sensitive help or inline text
1.160 mike 1354: detailing the actual values.<div class="example">
1.11 mike 1355: <p>For example, the following snippet:</p>
1356: <pre><meter min=0 max=60 value=23.2 title=seconds></meter></pre>
1357: <p>...might cause the user agent to display a gauge with a tooltip
1358: saying "Value: 23.2 out of 60." on one line and "seconds" on a
1359: second line.</p>
1.262 mike 1360: </div><p>The <code title="attr-fae-form"><a href="association-of-controls-and-forms.html#attr-fae-form" id="form-61">form</a></code> attribute is used to
1.190 mike 1361: explicitly associate the <code><a href="#the-meter-element" id="meter-15">meter</a></code> element with its
1.160 mike 1362: <a href="association-of-controls-and-forms.html#form-owner" id="form-owner-13">form owner</a>.<div class="example">
1.11 mike 1363:
1364: <p>The following example shows how a gauge could fall back to
1365: localized or pretty-printed text.</p>
1366:
1.160 mike 1367: <pre><p>Disk usage: <meter min=0 value=170261928 max=233257824>170 261 928 bytes used
1368: out of 233 257 824 bytes available</meter></p></pre>
1.11 mike 1369:
1.160 mike 1370: </div>
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